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      Comparación del rango de medida de defectos entre la perimetría estándar blanco/blanco y la perimetría Pulsar Translated title: Comparing the ranges of defect measured with standard white on white and Pulsar perimetries

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          Abstract

          Objetivo: Los umbrales normales de la perimetría Pulsar caen más rápidamente en el campo periférico que los estándar. Se han realizado dos estudios relacionados, en primer lugar se ha investigado la distribución de frecuencias de los defectos glaucomatosos en perimetría automática estándar (SAP), y la relación de los periféricos con los centrales (estudio A). A continuación se han tratado de definir los límites de examen Pulsar (estudio B). Material y métodos: Estudio A: las frecuencias se calcularon en 78.663 perimetrías SAP (G1-TOP, Octopus 1-2-3, Haag-Streit). Estudio B: 204 ojos con defecto medio (MD-SAP) inferior a 9dB se examinaron 8,92±4,19 veces con SAP (TOP-32, Octopus 311) y con perimetría de modulación temporal (T30W, Perímetro Pulsar, Haag-Streit). Resultados: Estudio A: el 50,7% de los estudios SAP presentaron valores de MD inferiores a 9dB y el 32,7% inferiores a 6dB. La correlación del MD de los 20º centrales con respecto al MD de los más periféricos fue de r=0,933. Estudio B: en los casos con valores de MD-TOP-32 inferiores a 6dB, SAP alcanzó sus posibilidades máximas de detección de defecto en el 0,02% de los puntos y Pulsar en el 0,29%. En los sujetos con MD-TOP-32 situado entre 6 y 9dB las frecuencias fueron 0,38% en SAP y 3,5% en Pulsar (5,1% para excentricidades superiores a 20º). Conclusiones: Pulsar permite detectar defectos, sin limitación de rango, en la mitad inicial de las frecuencias de defecto SAP esperables en el paciente glaucomatoso. Para estudiar la progresión de defectos más profundos el análisis deberá centrarse en los puntos centrales, donde el rango dinámico de ambos sistemas es más equivalente.

          Translated abstract

          Objectives: Normal thresholds on Pulsar perimetry fall faster than those of standard perimetry in the peripheral visual field. Two related studies were performed. Firstly, the frequency distributions of glaucoma defects on standard automated perimetry (SAP) and the relationship of the centre and periphery (Study A) were studied first, followed by an attempt to establish the limits of pulsar perimetry (Study B). Material and method: A: frequency of defects was calculated in 78.663 SAP perimetries (G1-TOP, Octopus 1-2-3, Haag-Streit). Study B: 204 eyes with mean defect (MD-SAP) lower than 9dB were examined 8.92±4.19 times with SAP (TOP-32, Octopus 311) and temporal modulation perimetry (T30W, Pulsar Perimeter, Haag-Streit). Results: Study A: 50.7% of the SAP examinations showed MD values lower than 9dB and 32.7% bellow 6dB. The MD correlation of the central 20º with the MD of the most peripheral points was r=0.933. Study B: in cases with MD-TOP-32 lower than 6dB, SAP had the maximum possibility of detecting defect in 0.02% of points and Pulsar in 0.29%. In subjects with MD-TOP-32 between 6 and 9dB frequencies were 0.38% in SAP and 3.5% in Pulsar (5.1% for eccentricities higher than 20º). Conclusions: Pulsar allows detecting defects, without range limitations, in the initial half of SAP frequencies expected on glaucoma patients. In order to study the progression of deeper defects the examination should focus on the central points, where the dynamic range of both systems is more equivalent.

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          Most cited references23

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          Contrast sensitivity and visual disability in chronic simple glaucoma.

          A battery of vision tests was used to quantify visual defect in a group of 50 patients with chronic simple glaucoma. The vision tests were near and distance visual acuity, visual fields, and contrast sensitivity to static and temporally modulated sinusoidal grating patterns. Of these, static contrast sensitivity function appears to be the most sensitive method of measuring visual defect in glaucoma patients. The visual disability experienced by the glaucoma patients was quantified by means of a questionnaire, and the relationship between perceived visual disability and visual defect was examined. It was found that results from a group of tests, near visual acuity, visual field, and contrast sensitivity measures, are the best predictors of the difficulty experienced by patients in performing visually dependent daily activities.
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            Isolating the effects of primary open-angle glaucoma on the contrast sensitivity function.

            We evaluated spatial contrast sensitivity functions in age-matched and lens density-matched healthy eyes, eyes with primary open-angle glaucoma, and eyes with ocular hypertension. We also controlled for refraction, visual acuity, pupil size, and previous ocular history. We found an overall reduction in contrast sensitivity for the glaucomatous eyes with a significant difference at 12 cycles per degree (P less than .012). Eyes with ocular hypertension were not significantly different from normal eyes. Significant differences were noted at several spatial frequencies with less careful controls for age and lens effects. We concluded that spatial contrast sensitivity may be a useful adjunctive diagnostic test for glaucoma, but interpreting the results without other clinical data may lead to errors in diagnosis.
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              Combined spatial, contrast, and temporal functions perimetry in mild glaucoma and ocular hypertension.

              To evaluate the diagnostic ability of a new perimetric procedure in glaucoma.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                aseo
                Archivos de la Sociedad Española de Oftalmología
                Arch Soc Esp Oftalmol
                Sociedad Española de Oftalmología (, , Spain )
                0365-6691
                April 2011
                : 86
                : 4
                : 113-117
                Affiliations
                [03] orgnameHospital Clínico San Carlos
                [01] orgnameHospital Universitario de Canarias orgdiv1Servicio de Oftalmología
                [04] orgnameInstituto de Investigaciones Oftalmológicas Ramón Castroviejo
                [05] Madrid orgnameUniversidad Complutense España
                [07] Madrid orgnameInstituto de Salud Carlos III España
                [02] orgnameUniversidad de La Laguna España
                [06] orgnameRed Temática de Investigación Cooperativa Patología Ocular Ligada al Envejecimiento, Calidad de Visión y Calidad de Vida
                Article
                S0365-66912011000400004
                10.1016/j.oftal.2010.11.020
                4882aaaa-67a5-47d6-94c5-99a9f8c1c6ba

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 22 November 2008
                : 26 November 2010
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 20, Pages: 5
                Product

                SciELO Spain


                Perimetría,Campo visual,Glaucoma,Umbral,Rango dinámico,Perimetry,Visual field,Threshold,Dynamic range

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